-
Notifications
You must be signed in to change notification settings - Fork 41
/
OrFilterQuery.java
62 lines (52 loc) · 2.09 KB
/
OrFilterQuery.java
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
/*
* Copyright 2023 Google LLC
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.example.datastore.filters;
// sample-metadata:
// title: Create a union between two filters
// description: Create a union between two filters (logical OR operator)
// [START datastore_query_filter_or]
import com.google.cloud.datastore.Datastore;
import com.google.cloud.datastore.DatastoreOptions;
import com.google.cloud.datastore.Entity;
import com.google.cloud.datastore.Query;
import com.google.cloud.datastore.QueryResults;
import com.google.cloud.datastore.StructuredQuery.CompositeFilter;
import com.google.cloud.datastore.StructuredQuery.Filter;
import com.google.cloud.datastore.StructuredQuery.PropertyFilter;
public class OrFilterQuery {
public static void invoke() throws Exception {
// Instantiates a client
Datastore datastore = DatastoreOptions.getDefaultInstance().getService();
String propertyName = "description";
// Create the two filters
Filter orFilter =
CompositeFilter.or(
PropertyFilter.eq(propertyName, "Feed cats"),
PropertyFilter.eq(propertyName, "Buy milk"));
// Build the query
Query<Entity> query = Query.newEntityQueryBuilder().setKind("Task").setFilter(orFilter).build();
// Get the results back from Datastore
QueryResults<Entity> results = datastore.run(query);
if (!results.hasNext()) {
throw new Exception("query yielded no results");
}
while (results.hasNext()) {
Entity entity = results.next();
System.out.printf("Entity: %s%n", entity);
}
}
}
// [END datastore_query_filter_or]